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Pinatubo Trunks

Pinatubo Trunks

4.8
Rated 4.8 out of 5 stars
1,229 Reviews
Regular price $ 30.00 USD
Regular price $ 25.00 USD Sale price $ 30.00 USD
Sale Sold out

Horizontal Fly, 95% MicroModal, Stay Flat Waistband, 2" inseam

Machine wash on cold, Dry on medium

Size Guide
Size
Color

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Save 20% when you buy 7+ pairs.

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📦 Orders ship within 1-2 business days

The Details

The Trunk That Got a Fly.

Pinatubo’s top-access horizontal fly offers a quick-draw, one-handed action, making it easy to reach in and go—putting the ‘fun’ back in functional.
The large, 3-inch deep front pouch, with minimal stitching, is designed to keep you separated from your thighs and comfortably supported all day long.

Wide and ultra-smooth waistband won't flip or mark your skin.

Legs that don't roll up or bunch up.

Inseam: 2 inches

52 Wash Guarantee. Because we can.

1st Order Fit Guarantee

Our number one goal is that you're happy with your purchase.

If something doesn't fit right on your regular priced Krakatoa, let us know and we will work with you to make it right.

They are usually a bit more snug when brand-new, so give it a wear and a wash to reach their final shape.

If you purchase multiple pairs, make sure you ONLY TRY ON ONE PAIR and make sure it's perfect on you.

Beyond the first pair, all underwear must be unworn, unwashed, in the original condition and packaging that you received them for an exchange or refund.

52 Wash Guarantee

We've built a tough product with advanced stitching, and the very best materials we could get our hands on.

That said, you should follow the care instructions: wash it cold and dry in medium temperatures with similar soft fabrics, for best results and durability.

We provide a 52 Wash Guarantee which is triggered by either 52 washes or 12 months from the date of purchase. If your item has any structural damage before 52 washes or 12 months, we'll replace them for just the cost of shipping.

Free US Shipping on Orders $75+

We provide free basic shipping for all orders over $75 in the United States.

View full details

Find your size

You'll need a a pair of your existing underwear, a flat surface, and a measuring tape.

I'm Alex, I made these for you.

THE FEATURES YOU ASKED FOR

Every little detail was obsessively fine-tuned, to deliver you an underwear experience like no other: 

FULL SUPPORT WITH A FLY
Putting the Fun in Functional

Say goodbye to readjustments!

Pinatubo’s 3” deep pouch design with minimal stitching keeps you comfortable and secure all day.
The one-handed, top-access horizontal fly provides effortless reach into the goods.
It separates you from your thighs, ensuring comfortable support through all of life’s adventures.

THE FINEST MICROMODAL FABRIC Exceptional Softness and Breathability.

No synthetics here -and no PFAS.

Feel softness like never before with an ultra-premium, hand selected 95% MicroModal fabric. We source only the best MicroModal because comfort is our #1 goal. (Learn about MicroModal). We just add 5% of Spandex to allow for it to move with you.

We never skimp on the quality of our fabrics and materials, neither on the craftsmanship. These products go on your softest, most sensitive parts. We won't settle for anything less than the very best.

SOFT STITCH HEMS For Legs That Stay Put.

Our Trunks are perfect for active guys who prefer a shorter leg that fits comfortably under pants or shorts. Whether it’s daily wear, hiking, sports, or lounging, they transition effortlessly from gym shorts to suits with aplomb.

UNFLIPPABLE WAISTBAND
Art On Your Body.

Our waistbands are wide, smooth, don't leave marks, and are truly unflippable, offering a secure fit that prioritizes style and your comfort over branding. We focus on modern designs rather than flashy logos, framing your body beautifully.

Inside, you’ll find positive, self-affirming words designed to motivate you daily, inspiring you to be a better person to yourself, and to those around you.

Experience the perfect blend of style and substance with a waistband that uplifts and empowers you.

HEY ALEX, I HAVE QUESTIONS!

What should I know about the fit?

The Pinatubo Trunk features a 2” inseam, with legs designed to stay put but may ride up slightly during active use.
The 3" deep pouch offers ample space with a top-acess horizontal fly for one-handed quick-draw action, while its double-layered construction provides both support and privacy.
All of this is enhanced by our use of our high-grade 95% MicroModal, an incredibly lightweight and breathable fabric.

What if I'm in between sizes?

Our sizes run pretty true and the materials do have stretch to them.

But if you're not sure which size is going to be the best for you, consider these three things:- Your waist in inches (pants size is OK).

- If your legs touch at the thighs.
- If you have a small, normal or large butt.

If your legs touch and your butt is large, you might jump a size.

If you have a small butt and thin legs, you can downsize.

What's MicroModal fabric?

In a word. Soft.

Really soft, our MicroModal is hand-selected to be of the highest grade available.

MicroModal is a modern technical fabric that is manufactured with cellulose from renewable Beechwood trees. Compared with Cotton, it's odor-resistant, 3 times softer, 50% more breathable, and it's not nearly as polluting or water-wasting.

Why such a big pouch?

Men come in all different shapes and sizes but for years underwear failed to respect our anatomy.

Our pouch is designed for the majority of men out there to accommodate and coddle. It's a blend of being soft with some stretch where needed, but also supportive for all day comfort. You won't need to adjust yourself anymore, because sticking to your legs is a thing of the past.

When will my item ship? How long will it take to arrive?

Please allow 2-4 days for processing, and the usual shipping times from the USPS or UPS: inside the US you can expect to see your package between 3-6 days.

We'll send you a confirmation email with your tracking information as soon as it ships.

If you have any questions or don't receive an email, feel free to reach out via our Contact Us Page.

What is your returns and refunds policy?

Our number one goal is that you're happy with your purchase.

If something doesn't fit right on your regular priced Krakatoa, let us know and we will make it right.

Try on a pair and make sure it's perfect in you. If it doesn't work for you, your first regular priced pair is covered.

After this first pair, all underwear must be unworn, unwashed, in the original condition and packaging that you received them for a refund.
If you bought multiple pairs, make sure you try ONLY ONE PAIR for fitting before you decide to use the rest.

INTRO PAIRS ARE FINAL SALE AND NOT RETURNABLE.

How do I wash my Krakatoa?

Krakatoa is quite resistant to shrinking and fading, but machine-washing them in cold water using the delicate setting and drying in low heat will keep them looking fresher for longer.

Please do not bleach, iron, or dry clean your boxer briefs or trunks. You can also wash it by hand and lay it flat to dry, for great results.

What's your 52 Wash Guarantee?

We've built a tough product with reinforced stitching that lays flat and the very best materials we could get our hands on.

That said, you should follow the care instructions.

We provide a 52 Wash Guarantee which is triggered by either 52 washes or 12 months from the date of purchase. If your item has any structural damage before 52 washes or 12 months, we'll replace them for just the price of shipping.

WHICH TRUNK IS BEST FOR ME?

Each Krakatoa Collection comes with a specific pouch and hem.
While they all share the same absurdly soft fabric and unflippable waistband, their pouches and hems are what set them apart.
Here is a quick guide:

  • 3" Low-Seam Pouch
    Top Horizontal Fly
    Stitched Hems
    2" Inseam

    Learn More 
  • The Original
    3" Sealed Pouch
    Stitched Hems
    2" Inseam

    Learn More 
  • U-Shaped Caldera Pouch
    Low-Profile StealthFly
    Seamless Hems
    1.5" Inseam

  • Sealed, Lined StratoPouch
    4" Sealed Pouch
    Seamless Hems
    1.5" Inseam

    Learn More 

CHECK OUR REVIEWS

See how we have impacted guys from all walks of life.
Our products are only as good as the impact they have on those that experienced them.

4.8
Rated 4.8 out of 5 stars
Based on 1,229 reviews
Total 5 star reviews: 1.1k Total 4 star reviews: 105 Total 3 star reviews: 23 Total 2 star reviews: 5 Total 1 star reviews: 5
90%would recommend these products
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1,229 reviews
  • Thomas B.
    Verified Buyer
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    Great

    I like the length and are very comfortable

  • Robert B.
    Verified Buyer
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    Super smooth

    Can wear comfortably all day

  • Jason R.
    Verified Buyer
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    Love them

    Great support. Super soft. Highly recommended.

  • Harold C.
    Verified Buyer
    INTRO PAIR TRUNK
    Reviewing
    INTRO PAIR TRUNK
    Rated 5 out of 5 stars
    intro pair

    better than expected. just cant afford the price.

  • Chris M.
    Verified Buyer
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    Easy access

    These are very comfortable and well made. And when they say "easy access " they're not lying. Just reach in and go. Oh yeah. As they say. " she'll like it too " !!

  • Charles B.
    Verified Buyer
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    First time purchasing

    They are very soft and comfortable to wear with no bunching.

  • Liam
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    5 Stars

    Very supportive and comfortable

  • Liam
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    5 Stars

    Very comfortable, great support , colors are on point and not fading dyes when washed.

  • Michael L.
    Verified Buyer
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    Best Manties!!

    My girlfriend and I agree

  • Steven E.
    Verified Buyer
    Pinatubo Trunks
    Reviewing
    Pinatubo Trunks
    Rated 5 out of 5 stars
    Great product

    These are great. I normally wear tommy John's underwear but decided to give these a try. They're cheaper and honestly better. Would recommend them to anyone.

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